2yrs ago after changing the batteries on my truck the immobilizer somehow tuned itself to my transit van key and no matter what I do I can't get it to tune back to the original transponders. The transit has gone now but up until 2 days ago I still had the key that worked,my wife lost the keys and now the truck is stuck on the drive. I have the spare keys and the original fobs but cannot get it to work, can anyone help?

angryman, October 2011